[#38] node: Fix linter warnings

Signed-off-by: Pavel Karpy <p.karpy@yadro.com>

cmd/frostfs-node/morph.go

@@ -23,14 +23,8 @@ import (
 const (
 	newEpochNotification = "NewEpoch"
 
-	// notaryDepositExtraBlocks is the amount of extra blocks to overlap two deposits,
-	// we do that to make sure that there won't be any blocks without deposited
-	// assets in a notary contract; make sure it is bigger than any extra rounding
-	// value in a notary client.
-	notaryDepositExtraBlocks = 300
-
 	// amount of tries(blocks) before notary deposit timeout.
-	notaryDepositRetriesAmount
+	notaryDepositRetriesAmount = 300
 )
 
 func initMorphComponents(c *cfg) {

pkg/local_object_storage/blobstor/fstree/fstree.go

@@ -247,9 +247,11 @@ func (t *FSTree) Put(prm common.PutPrm) (common.PutRes, error) {
 			err = common.ErrNoSpace
 			_ = os.RemoveAll(tmpPath)
 		}
+	} else {
+		err = os.Rename(tmpPath, p)
 	}
 
-	return common.PutRes{StorageID: []byte{}}, os.Rename(tmpPath, p)
+	return common.PutRes{StorageID: []byte{}}, err
 }
 
 func (t *FSTree) writeFlags() int {

pkg/local_object_storage/pilorama/boltdb.go

@@ -933,9 +933,3 @@ func internalKey(key []byte, k, v string, parent, node Node) []byte {
 	key = append(key, raw[:]...)
 	return key
 }
-
-func toUint64(x uint64) []byte {
-	var a [8]byte
-	binary.LittleEndian.PutUint64(a[:], x)
-	return a[:]
-}